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USGS CMG InfoBank Geology School: Canadian Shield

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Title Comment Keywords
Center of Continents 02:12 - 02:44 (00:32) / 0.5 MB continent, craton, shield, "Canadian Shield", erosion, "North American Continent", "ice sheet", flatland, soil, "sedimentary rock", crust
Ancient Heart of North America 02:44 - 03:48 (01:04) / 1.9 MB "Canadian Shield", "Superior Province", craton, granulite, greenstone, "metamorphic rock", erosion, "volcanic rock", "sedimentary rock", "island arc"
Geology School Keywords
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URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/keypage/Canadian_Shieldr.html
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Page Last Modified: Tue Feb 5 05:12:52 PST 2013  (chd)